The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
This work was carried out with the purpose to evaluate the minerals retention during the pregnancy of goats with one or two foetus. The estimate of retention was based in the difference between the total of each mineral stored in the foetus, uterus, membranes, fetals fluids and mammary gland of animals in the differents stages of pregnancy and the total of each mineral stored in the empty goats, using the model of prediction: ln Y = A – B e -C X ; Y = A e B X and ln Y = A+Bx+Cx2, where x = time of pregnancy. The comparison of the estimative with the real values obtained show that the suggest model explained with coherence and precision the biological behavior of minerals retention during all pregnancy.
Utilization of mathematic models to estimate the minerals retention during the pregnancy of goats
Costa,Roberto Germano and Resende,Kleber Tomás de and Rodrigues,Marcelo Teixeira and Espechit,Cláudio José Borela and Queiroz,Augusto César de. Utilization of mathematic models to estimate the minerals retention during the pregnancy of goats. R. Bras. Zootec. [online]. 2003, vol.32, 2, [cited 2026-03-15], pp.425-430. Available from: <https://rbz.org.br/article/utilization-of-mathematic-models-to-estimate-the-minerals-retention-during-the-pregnancy-of-goats/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35982003000200022.
Costa,Roberto Germano; Resende,Kleber Tomás de; Rodrigues,Marcelo Teixeira; Espechit,Cláudio José Borela; Queiroz,Augusto César de. Utilization of mathematic models to estimate the minerals retention during the pregnancy of goats. R. Bras. Zootec., v.32, 2, p. 425-430. Apr. 2003. Available from: <https://rbz.org.br/article/utilization-of-mathematic-models-to-estimate-the-minerals-retention-during-the-pregnancy-of-goats/>. acess on 15 Mar. 2026. http://doi.org/10.1590/S1516-35982003000200022.
Costa,Roberto Germano, & Resende,Kleber Tomás de, & Rodrigues,Marcelo Teixeira, & Espechit,Cláudio José Borela, & Queiroz,Augusto César de. (2003). Utilization of mathematic models to estimate the minerals retention during the pregnancy of goats. R. Bras. Zootec., 32(2) , 425-430. http://doi.org/10.1590/S1516-35982003000200022.
CostaRoberto Germano, ResendeKleber Tomás de, RodriguesMarcelo Teixeira, EspechitCláudio José Borela, QueirozAugusto César de. Utilization of mathematic models to estimate the minerals retention during the pregnancy of goats. R. Bras. Zootec. [Internet]. 2003 Apr [cited 2026 Mar 15]; 32(2): 425-430. Available from: https://rbz.org.br/article/utilization-of-mathematic-models-to-estimate-the-minerals-retention-during-the-pregnancy-of-goats/. http://doi.org/10.1590/S1516-35982003000200022.
Figure 3
Ruminal disappearance of ash-free neutral detergent fiber (aNDFom) at 30 h of in situ incubation in corn husks (fresh and ensiled) treated with calcium oxide (CaO) and a mixture of corn heavy steep water and sugarcane molasses (HM).
